Fe-ions modified mesoporous Bi2WO6 nanosheets with high visible light photocatalytic activity

被引：146
作者：
Guo, Sen [1 ,3 ]
Li, Xiaofang [1 ,3 ]
Wang, Haiqiang [1 ,3 ]
Dong, Fan [2 ]
Wu, Zhongbiao [1 ,3 ]
机构：
[1] Zhejiang Univ, Dept Environm Engn, Hangzhou 310058, Zhejiang, Peoples R China
[2] Chongqing Technol & Business Univ, Coll Environm & Biol Engn, Chongqing 400067, Peoples R China
[3] Zhejiang Prov Engn Res Ctr Ind Boiler & Furnace F, Hangzhou 311202, Zhejiang, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2012年 / 369卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Bi2WO6; Visible light; Photocatalysis; Toluene; Impregnation; Fe-ions; ELECTRON-PARAMAGNETIC-RESONANCE; DYE-SENSITIZED TIO2; METHYLENE-BLUE; DEGRADATION; MICROSTRUCTURES; OXIDATION; PHOTODEGRADATION; PHOTOACTIVITY; SEMICONDUCTOR; MICROSPHERES;
D O I：
10.1016/j.jcis.2011.12.007
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Fe-ions modified mesoporous Bi2WO6 nanosheets (Fe-Bi2WO6) were successfully synthesized via a simple two-step method, which involved a template-free hydrothermal process and a following impregnation treatment. The resultant products were characterized by XRD, TEM, XPS, EDX, ESR, UV-Vis, PL, and visible light photocatalytic measurements. Experimental results indicated that the addition of a small amount Fe-ions (optimized content at 0.1 wt.%) could evidently improve the activity of Bi2WO6. The apparent reaction rate of Fe-Bi2WO6-0.1% (k, 0.099 min(-1)) was 3.2 times higher than that of Fe-(BiWO6)-W-2-0% (k, 0.031 min(-1)). The Fe-ions mainly existed as Fe3+ and Fe2+ ions, which were uniformly distributed on the surface of Bi2WO6 nanosheets and some Fe3+-ions substituted Bi3+-ions in Bi2O2 layers. Both of the concentration and state of Fe-ions played vital factors for the improved visible light photocatalytic activities. (C) 2011 Elsevier Inc. All rights reserved.
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收藏
页码：373 / 380
页数：8
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